Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$179M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$90.1M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$56M |
| 4 |
iShares Silver Trust
SLV
|
+$41.7M |
| 5 |
Advanced Micro Devices
AMD
|
+$39.8M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.8M |
| 2 |
Verizon
VZ
|
+$42.5M |
| 3 |
Occidental Petroleum
OXY
|
+$34.7M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Direxion Daily S&P 500 Bull 3x ETF
SPXL
|
+$32.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.67% |
| 2 | Consumer Discretionary | 0.37% |
| 3 | Industrials | 0.24% |
| 4 | Healthcare | 0.22% |
| 5 | Financials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5401
Xylem
XYL
$27.3B
| $168K | ﹤0.01% |
1,971
+1,429
| +264% | +$137K |
|
|
DMTK
5402
PUT
DELISTED
DermTech, Inc. Common Stock
DMTK
| $168K | ﹤0.01% |
11,500
+7,900
| +219% | +$106K |
|
|
IGAC
5403
CALL
DELISTED
IG Acquisition Corp. Class A Common Stock
IGAC
| $168K | ﹤0.01% |
17,100
+7,300
| +74% | +$71.8K |
|
5404
Barclays
BCS
$93.4B
| $167K | ﹤0.01% |
+21,217
| New | +$216K |
|
5405
CALL
Cooper Companies
COO
$14.2B
| $167K | ﹤0.01% |
1,600
-22,000
| -93% | -$2.21M |
|
5406
CALL
First Financial Bankshares
FFIN
$5B
| $167K | ﹤0.01% |
3,800
+3,600
| +1,800% | +$172K |
|
5407
Huntington Ingalls Industries
HII
$12.6B
| $167K | ﹤0.01% |
+842
| New | +$164K |
|
|
IMOS
5408
ChipMOS TECHNOLOGIES
IMOS
$1.64B
| $167K | ﹤0.01% |
4,715
+4,614
| +4,568% | +$161K |
|
5409
CALL
Jones Lang LaSalle
JLL
$16.8B
| $167K | ﹤0.01% |
700
-1,500
| -68% | -$366K |
|
5410
PUT
Ultragenyx Pharmaceutical
RARE
$2.56B
| $167K | ﹤0.01% |
2,300
+1,600
| +229% | +$111K |
|
5411
PUT
Valley National Bancorp
VLY
$7.92B
| $167K | ﹤0.01% |
12,900
+10,400
| +416% | +$145K |
|
5412
Boot Barn
BOOT
$4.68B
| $166K | ﹤0.01% |
1,757
-13,176
| -88% | -$1.25M |
|
5413
CALL
EyePoint Inc
EYPT
$1.08B
| $166K | ﹤0.01% |
13,700
+9,800
| +251% | +$107K |
|
5414
PUT
Nkarta
NKTX
$154M
| $166K | ﹤0.01% |
14,600
+13,700
| +1,522% | +$147K |
|
5415
RCM Technologies
RCMT
$202M
| $166K | ﹤0.01% |
16,846
+16,564
| +5,874% | +$119K |
|
5416
PUT
Petco
WOOF
$794M
| $166K | ﹤0.01% |
8,500
-23,700
| -74% | -$443K |
|
|
WSR
5417
CALL
DELISTED
Whitestone REIT
WSR
| $166K | ﹤0.01% |
12,600
-12,000
| -49% | -$138K |
|
|
TXNM
5418
TXNM Energy Inc
TXNM
$6.42B
| $166K | ﹤0.01% |
3,499
-18,626
| -84% | -$847K |
|
|
LHDX
5419
DELISTED
Lucira Health, Inc. Common Stock
LHDX
| $166K | ﹤0.01% |
46,736
-14,196
| -23% | -$69.7K |
|
5420
CALL
Biomerica
BMRA
$4.91M
| $165K | ﹤0.01% |
4,638
-3,887
| -46% | -$129K |
|
|
MAPS
5421
PUT
DELISTED
WM TECHNOLOGY INC A
MAPS
| $165K | ﹤0.01% |
21,200
-121,800
| -85% | -$691K |
|
5422
CALL
MKS Inc
MKSI
$19.8B
| $165K | ﹤0.01% |
1,100
-4,700
| -81% | -$730K |
|
5423
SES AI
SES
$200M
| $165K | ﹤0.01% |
18,240
+18,042
| +9,112% | +$136K |
|
5424
STAG Industrial
STAG
$7.43B
| $165K | ﹤0.01% |
+3,996
| New | +$165K |
|
5425
CALL
Western Alliance Bancorporation
WAL
$8.87B
| $165K | ﹤0.01% |
2,000
-15,600
| -89% | -$1.53M |
|
Similar funds
Simplex Trading's Q1 2022 Portfolio in Review
As of Q1 2022, Simplex Trading held 12,038 positions worth $109B, up 10% from $99B the previous quarter. Its ten largest holdings account for 37% of the portfolio.
Simplex Trading deployed $17.5B of net new capital in Q1 2022, opening 1,603 new positions and adding to 4,441 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 652,921 shares worth $86.2M.
By sector, the portfolio is most concentrated in Technology at 0.67% of assets, up from 0.61% a quarter earlier, followed by Consumer Discretionary and Industrials.
On the sell side, the largest reduction was Verizon, an estimated $42.5M trimmed.
- Simplex Trading's largest Q1 2022 buy was iShares 20+ Year Treasury Bond ETF: 652,921 shares worth $86.2M.
- Simplex Trading added most to Apple in Q1 2022, an estimated $179M increase.
- Simplex Trading's biggest Q1 2022 reduction was Verizon, cutting an estimated $42.5M.
- Simplex Trading fully exited State Street Financial Select Sector SPDR ETF in Q1 2022, selling an estimated $42.8M.
- Simplex Trading's ten largest holdings make up 37% of its $109B portfolio in Q1 2022.
- Simplex Trading opened 1,603 new positions and closed 1,637 in Q1 2022.
- Simplex Trading's portfolio value rose 10% quarter-over-quarter to $109B.
Based on Simplex Trading's 13F filing for Q1 2022, filed 2 May 2022.